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问题描述
我的接口定义为
public interface IReaderInfo { string Displayname {get;} }和实现该接口的类
public class ReaderInfo : IReaderInfo { string DisplayName {get;} }然后我创建了一个返回列表的函数
I then created a function which return List
public List<ReaderInfo> GetReaders { var readers = new List<ReaderInfo>(); var Ireaders = someobject.Getreaders();// Returns the list of IReaderInfo. // Now i would like cast Ireaders as readers and return. }我该如何投放?
推荐答案您必须使用投放的项目创建新列表:
You have to create a new list with casted items:
var readers = Ireaders.Cast<ReaderInfo>().ToList();或者,如果可能存在不兼容的IReaderInfo条目,而您只希望结果中包含实际的ReaderInfo对象:
Or, if there is a possibility to have incompatible IReaderInfo entries and you only want the actual ReaderInfo objects in the result:
var readers = Ireaders.OfType<ReaderInfo>().ToList();更多推荐
我如何转换List< Interface>列出< Class>在C#中
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